Cast a spell -- can then set spinning (7)
I believe the answer is:
enchant
'cast a spell' is the definition.
(thesaurus)
'can then set spinning' is the wordplay.
'set spinning' indicates an anagram (I've seen this in other clues).
'can'+'then'='canthen'
'canthen' anagrammed gives 'ENCHANT'.
(Other definitions for enchant that I've seen before include "Hypnotise" , "Delight, cast spell over" , "Delight or bewitch" , "Entrance" , "Beguile" .)